Fostex 127e in a 13.2L Box

Here are sims from WinISD for the Fostex 127e (purchased from Madisound). Specs are taken directly from the Fostex pdf file. Max flat (scroll down) is 12.2L cab with 2" round x 3" port. Currently I have 13.2L boxes to use for these drivers and wanted to make something a little different than simply mounting the driver in a box (although from the sound it seems that's an excellent idea).

To warm the sound I have built in a small bass hump (red line) and will be adding a super tweeter on the back ($1.25 piezo from partsexpress.com). The speaker will be stand mounted and I hope to further tune to taste by moving closer/farther from the back wall.

Max Flat for Fostex 127e as per WinISD